And anthony fries



lNIIllD STATES f AParitivr OFFICE.

IIENRY It. OASSIDY, OF DELHI,` OHIO, AND ANTHONY FRIES, OF BROOK '4 VILLE, INDIANA.

SPECIFICATION forming part of Letters Patent No. 325,787, dated September 8, 1885.

Application tiled September 25, 1884. (No model.)

To all whom t may concern:

Be it known that we, HENRY R. CAssrDY, of Delhi, Hamilton county, Ohio, and AN THoNY FRIEs, of Brookville, Franklin county, Indiana, haveinvented certain new and useful Improvements in Brick-Kilns; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the drawings forming a part thereof. 1

Our invention relates to brickkilns, its object being to improve the burning of the brick; and to this end it consists in a novel manner of constructing the kilns, and in a novel construction and arrangement of the furnace thereof, as hereinafter fully set forth.

In the drawings, Figure 1 is a face view of our improved kiln, partly broken away to show the interior, Fig. 2, a vertical section on the line xa", Fig. l, and Fig. 3 a perspective view with aportion of the walls removed to show Vthe interior.

K indicates a furnace at the front of the kiln, which furnace in its general features may be of any usual and well-known construction-that is to say, it will embody a grate, tire-chamber, and ash-pit, as usual. This furnace communicates by an opening, L, (shown in Figs. 2 and 3,) with a long passage or chamber, E, extending laterally across the lower front side of the kiln.

Immediately under the opening L are openings D, smaller than the openings L, which also open into the hotair chamber E, as shown in Fig.2. The openingsD receive cold air, which enters beneath the furnace-grate,u and delivers it into the chamber E, where it mingles with the smoke and gases escaping from the furnace through openings L, warmedV perhaps slightly in its passage through the ashpit. The air thus entering beneath the grate and passing to chamber E tends to retard the combustion on the grate and make'it more gradual or less violent than it would be if the air all passed up through the flue. As a consequence, the fuel is coked and decomposed to a very considerable extent, and the gases and products of such decomposition or slow combustion pass into chamber E, where they mingle with the air entering through openings D and are consumed. In thus mingling and It will be noticed that the floor F of the chamber E is inclined upward, so that as the cold air enters the chamber E it` will be directed upward so that it may be mingled with and be heated by the gases and smoke discharged from the furnace.

In the wall of the chamber E next to the kiln, are eyes or openings C (shown in Figs.

l and 3,) which open and discharge heated air from the chamber E directly into the lower part of the kiln.

In order to deliver heated air at or near the top of the kiln, or at any other point 4other than the eyes C, we provide the front wall of the kiln with vertical lines G, having lateral dischargemouth J, and also valves H, as

shown in Fig. 2. i

It will be noticed that the fines G open into the chamber E between the eyes C, and it will also be noticed that the eyes C are arranged at equal distances each side of the opening L,

but on the opposite side of the chamber there-` from. If the heated air were discharged into the kiln wholly through the eyes C, it would become chilled and difticultywould be experienced in creating the required upward draft. This trouble we entirely overcome by the construction -shown in the drawings, for, when the air is allowed to enter at the top of the kiln, it creates an upward draft therein which starts and maintains a similar draft through the eyes 4C and up through the kiln.

The amount of air admitted to the top of the kiln can be varied as desired, by means of the valves H.

After the bricks in the kiln are nearly burned the liuc G can be closed and all the air admitted through the lower openings or eyes C, the bricks being warm enough not to interfere with but rather aiding the upward draft.

roo

Trouble is usually experienced in burning bricks to get those in the corners thoroughly burned, as the corners of the kiln are Ordinarily made square. To remedy this We curve or round the interior corners, I, of the kiln from top to bottom, as shown in Fig. 3. This arrangement allows us to place the bricks quite close in the corners, and it has been found that there are no cold currents therein, such as are found to exist when square corners are employed. The sharp edge of the pile of bricks in a square-cornered kiln intercepts the air in passing through the same, and interferes with the proper circulation to such an extent that the bricks in the corner are not properly baked, Whereas under our construction the air passes around the corners with- Out difficulty and thoroughly bakes all the bricks therein. Y

y This feature of the rounded corners is a matter of considerable importance, and the results of practical Working of the kiln so constructed show conclusively its advantages over the Old style Of kiln with square corners. In all square-cornered kilns, so far as We are aware, there are a large number of bricks in the corners that remain unduly soft, but under Our plan this difficulty is obviated.

Having thus described our invention, what We claim is- AThe combination, in a brick-kiln, of a burningchamber having its inner corners rounded, a' furnace, and suitable heat-supplying ducts, all arranged and operating substantially as shown and described.

HENRY R. OASSIDY. ANTHONY FRIES. Titnessesz V H. L. COOPER, L. G. ROBINSON. 

